Taking improving 9K culture solution inoculated from Thiobacillus ferrooxidans (calling "GZY - 1#" ) as the leaching agent, N902 as the extraction agent, the sulfuric acid solution as a stripping agent, and the lead-based alloy plates and stainless steel plates as the anode and cathode of the electrolyzerat respectively, experiments of biochemical leac-hing-extraction-electrodeposition are made to extract copper from waste printed circuit boards of Guangdong Qingyuan Jintian Nonferrous Metals Company at room temperature. Under the appropriate conditions, the average copper leaching rate from samples reached 95. 29% , and the average copper content in leached residue reduced by 0. 088%. Through the extract-back-extract-electrodeposition, the electrodeposited copper purity reached 99. 95% . Through the tests, high recovery of copper from waste printed circuit boards was realized, and the problem of the copper interference in comprehensive utilization of non-metallic materials in the waste printed circuit board was solved as well.%以接种代号为GZY-1#的氧化亚铁硫杆菌的改进9K培养液为浸出剂、N902为萃取剂、硫酸溶液为反萃剂、铅基合金板和不锈钢板分别为电解槽的阳极和阴极,在室温下对广东清远进田有色金属公司废弃线路板重选尾渣中的铜进行了生化浸出-萃取-电积试验.在选定的合适条件下,试样中铜的平均浸出率达到95.29％,浸渣平均铜含量降至0.088％;浸出液经萃取-反萃取-电积,获得了纯度达到99.95％的电积铜.试验不仅使废弃线路板重选尾渣中的铜得到了高效回收,还解决了铜对废弃线路板重选尾渣中非金属材料综合利用的干扰问题.
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